Binder rings and method of making same



Feb. 3, 1948.

I. SPINNER BINDER RINGS m METHOD OF MAKING SAME Filed Dec. 16, 1942 fiz'dare ,vzkzzer W Patented Feb. 3, 1948 I BiNDER. nines imminent MAKING SAME i lsidore Spinner, Chicago, Ill z t ss' lgno r to Plastic Binding "tion: of Delaware orporation, Chicago, 111., a corpora- Application December 16, 1912; S eriaifio. 469,255

(c1. iiim) 8 Claims.

This invention relates to hinder rings and tea method of making the same, particularly to hinder rings of resilient plastic material for i'ise in bindihg a stack of papers, or for holding eurtains, draperies or the like on a rod, or forother purposes. a v n It is one of the objects or" the present invention to provide a method'of making hinder rings whereby a large number "oisuch rings may be made in a single operation and ata low cost. It is' a ifurthe'r object of the present invention to provide va method .ofll iiak'ihg'bir'idih g rings whereby a'gro'up of rihgswhich are made at the same tiniei'arehel'd togetheras a unit,ffrbin which 'theindividual in' s'ma be physically separated onea't a time as it becomes desirable to use'themh,

- The attaihmnt 'ofthefahov'e ahd fur her ohthey oon'stitute' hue of severance along w'hi'ch the blank is later to be severed. The cuts or -perforations 3 are su'chfthat the minimum amount of material is left to hold the blanktoget'her. There is thus produceda series of strips 4-} lightlyheld togetherand readily severable The blank lfis then to be curled into cyiihdric'al jects of the present ihventionwillbe apparent iro'mthe following. -s'peeificailion" taken in conjunction with the aocompanyihg'drawing formmg apart thereof.

Inthe' drawing:ih t ;Fig'ulre leis a'pl'an vi oita blank from w'hieh ap1urality"of rings to he made simultaneously; Figure 2 is anfien'd' view of the blank of Figure1; V,

'3 is anl'e'nlargdseotional' view taken along the lihe a-sxor Figure 1;

'Fibi'" "e. "fis'a' "repeat-re view of the blank of Figurelfcurledihto tubular r ganq' illustrat iiig'fthe endvring severed from the rest of the endl'vi'ew of one of the rings of Figure '6 shows" a modifiediorm of blank;

31 firsPeCtiVe Q a Sa ra pag 5du1idhy the rings of thepresent invention; a

and

Figure a'is a diagrammatic'viwiilustiatih the manner iiffmirl ing the 'blahk of Figures '1 or 6 iiitofthe form of Efi gure'4. 1

In. th" accompafi "ingdrawing like numeralsdesil ite 'likeparts throllhout. 1

"Rerrence: how behad more 'pame iariy ime y acrossrthe strip. lines: 3 are-formedb'y "iittiiig, sc'or'iii'or' perforating the sheet and referenceor tubular form. This'is done bylplacing the blank on a hernia sheet that rests upon a heated 7 table and thenJirhile-holdingj the flexible sheet tauh thesheet with the blank I thereon is rolled around a maridrel", to curl the blahk into tubular form, the ihlanh heir'ig. held by the sheet around the mandreli for a length of time sufflcieht to per.- mit thepl'astic material to cool to a temperature such that it retains its tubular shape.

Figure 4 shows the blank i curled into tubular shape. The blank is lcurled through an are exceedihg'36of' so that the longitudinal edges of the blank I overlap oneanother, as illustrated in Figure' l, Themaxiihum temperature to which the material. is heatedpreceding or during the curling operationisinsuflicierit to cause the materi'alltb' Become tacky, and'therefore insufllcient to cause the material to become: additionally bonded together at the previouslyvformed lines of cleavage 3 The lines of cleavage 3 extend circumfer'entiallyaround the cylinder 8 and form lines of cleavage for facilitatingbreaking the c'ylinderinto a plurality ofseparate rings. a

The cy j n der 810i Figure 4' constitutes an artiole ofnianufacture and sale. The purchaser or user ,ofthis'cylihd'er may then break off the rings; one at a time, as individual rings are needed One such ring broken from the rest of thecylinder is indicated at 9-. t It is broken from the rest ofithe cylirider along. the line of cleavage 3. The ringffl'm'ay he used: for binding a stack of sheets of paper together; {This may be accomplished by merely manually. opening the' endlfl ofthe ring;

apdthen threading the ring through aligned perf rotations iha stack of pages. When the 'end'v lll is ,release'dit, springs back to the position ofFigure 's, due to its own resiliency, andis in pressure contact with thepartll of the'ring overlapped thereby, thus. holding the ring closed A pin-- rality offrhigs, indicated at l2- I'2,. may the threaded throughseparate groups of aligned perforations i a-stackpt pages-to bind a group of pages togetherjasr illustratedin Figure 7.-

Figure 6 shows a modified form of blahk corresponding to the blank of Figure 1. This blank is the same as that of Figure 1 except that the lines of cleavage or weakening, indicated at l3, which corresponds to the scored lines 3 of Figure 1, are in this instance cut through the entire thickness of the material. The lines [3 are discontinuous, leaving narrow uncut portions M for holding the series of strips 4--4 tog'ether. After the blank'of Figure 6 is curled in the same manner as is the blank illustrated in Figure 4', the respective rings may be severed from one another by cutting or breaking the very narrow connecting parts l4 between adjacent strips or rings.

The severed rings are then the same as the ring 3 9ofFigure4.

Figure 8 illustrates one method of making the binder cylinder 8 of Figure 4. The blank I rests on a flexible cloth sheet l upon a heated table and myself, No. 2,211,743, issued August 13, 1940.

to which reference may be had.

While I have herein shown a binder that is curled into cylindrical form 8, the blank I of Figure 1 may be curled into a tube of a cross section other than circular. For instance, the tube may be or oval cross section, or it may be of'a D-shaped section, which is the shape of the section of the binder of my Patent No. 2,277,834, issued March '31, 1942. It is understood, however, that the particular shape of cross section of the tube 8 of Figure 4 is variable as desired, but in any event the lines of cleavage which divide the tube into uniform separate binders extend around the entire periphery of the curled or formed blank.

The individual rings or binders 9 may be used to bind stacks of pages to constitute a book, or may be used to support or hold other articles such as, for instance, curtains, drapes, or the like.

In compliance with the requirements of the patent statutes I have here shown and described a preferred embodiment of my invention. Itis, however, to be understood that the invention is not limited to the precise construction here shown, the same being merely illustrative of the principles of the invention.

[What I consider new and desire to secure by Letters Patent is:

1. A plurality of joined separable binder rings comprising a continuous sheet curled into tubular form with the edges of the sheet overlapping, the extent of overlap being less than 360, the sheet being of resilient material and held in tubular shape by its own resiliency, the overlapped portions being physically separable toopen the tube and the material being sufliciently resilient so that upon release of the opened overlapped por-' tions of the tube those portions spring back under their own resiliency to complete the tube, the tube being weakened along a plurality of spaced lines of cleavage extending through sub-,

4 binder rings each adapted to be opened to be inserted through an article t be held thereby. said joined rings comprising a continuous sheet curled into tubular form with the edges of the sheet overlapping, the extent of overlap being less than 360, the sheet being of resilient material and held in tubular shape by. its own resiliency, the overlapped portions'being physically separable to open the tube and the material being sufiiciently resilient so that upon release of the opened overlapped portions of the tube those portions spring back under their own resiliency -to complete the tube, the tube being weakened along a plurality of uniformly spaced lines of cleavage each of which extends through almost but not the entire thickness of the material and around substantially the entire periphery of the tube and in 'a planesubstantially at right angles towthe longitudinally axis of the tube thereby dividing the tube into a plurality of side by side rings joined together at their contacting edges.

'3. A plurality of side by side joined separable binder rings each adapted to be opened to be inserted through an article to be held thereby, said joined rings comprising a continuous sheet curled into tubular form with the edges of the:

sheet overlapping, the 'extent of overlap being less than 360, the sheet being of resilient material and held in tubular shape by its own resiliency, the overlapped portions being physically separable to open the tube and the material being along a plurality of uniformly spaced parallelf sufiiciently resilient so that upon release of the opened overlapped portionsof the tube those l portions spring back under theirown resiliency to-complete the tube, the tube being weakened;

lines of cleavage each of which extends through substantially the entirethickness of the material and around substantially the entire periphery of the tube, and in a plane substantially at right angles to the longitudinal axis of the tube to? contact with one another for their entire length,

and almost but not completely severed from one" another so that the strips remain together asa" continuous sheet, rolling the sheet into cylindrical form about an axis at right angles to the said lines of cut and maintaining the material at a" temperature sufiiciently elevated to impart'a permanent set thereto upon subsequent cooling of, the cylinder so that the respective strips areformed into rings, and then after cooling severing the contacting rings from one another.

-5. The method of forming a, plurality of plastic resilient binders which comprises providing a continuous plastic sheet, weakening the sheet along a'plurality of spaced lines of severance" extending almost but not completely'through the sheet and across the full width thereof, then rolling the sheet to form a tube, and applying heat to the material to impart a'permanent setthereto upon cooling, and then holding the tube in its rolled condition untilthe material thereof has cooled suificiently to retain its rolled shape. 6. The method of forming a plurality of plastic resilient binders which comprises providing a continuous plastic sheet, weakening the sheet" along a plurality of uniformly spaced parallel lines of severance across the sheet, then rolling the sheet to form a tube having its longitudinal axis at right angles to the lines of severance, maintaining the material at an elevated temperature sufficient to impart a permanent set thereto upon subsequent cooling, and after cooling of the tube then severing the tube along the lines of severance.

7. The method of forming a plurality of plastic resilient binder rings which comprises providing a continuous plastic sheet slit along a plurality of parallel lines transversely of the sheet to form a plurality of strips almost but not completely severed from one another and almost in contact with one another along their entire longitudinal edges, heating said sheet, preparatory to curling of the same, to a temperature sufiiciently high to impart a permanent set to the subsequently curled sheet upon cooling of the same, curling the sheet into tubular form about a longitudinal axis at right angles to said parallel lines of cut,

and then permitting the curled sheet to cool to form the strips into rings almost but not completely severed from one another.

8. The method of forming a plurality of plastic resilient binders which comprises providing a continuous plastic sheet weakened along a plurality of spaced parallel slits which extend across the sheet for substantially the full width thereof 6 thereby forming lines of severance, heating the sheet, then rolling the hot sheet to form a tube, the temperature to which the sheet is heated being sufiicient to impart a permanent set to the rolled sheet upon subsequent cooling, and holding the sheet in its rolled form until it has cooled sufiiciently to retain its rolled form, thereby forming a plurality of connected rings each between adjacent weakened lines of severance.

ISIDORE SPINNER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

